I'm trying to create issues by import from CSV. One of the fields I am importing into a custom field defined as type checkbox (only single checkbox, not a multiline drop down). I keep getting errors like "The value [ {null=(whatever value I had)} ] can't be added to the Custom Field [ field ]. The value [ {null=(whatever value I had)} ] can't be found or is in the incorrect format".
I've tried with mapping to "Yes" and "No", "1" and "0", "TRUE" and "FALSE", "T" and "F", but I can't figure out what the right value is to use to be able to set this checkbox to checked or not.